Internal-combustion engine.



A. P. COTTLE.

INTERNAL COMBUSTION ENGINE. 'APPLICATION FILED JUNE 25.1914.

Patented 11011.17, 1914.

2 SHBBTSSHEBT 1.

n l a |11 vanto@ @www @zg A.P.00TTLE.' INTERNAL GOM}.3 USTION ENGINE. 'APPLICATION FILED JUNE 25, 1914.

1,1 17,642. Patented N0v.17,1914.

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1111 mpfmf f-. tica? c1111 minera turn. pipe is connected to deliver'to the reser- Voir 23.

The fuel feed receptacle isconnectedhy the passage 26, 'which opens into the feed .receptacle1 alcove the .mouth 'of the return pipe 25, to thepassage 8 in front-of therestriction l'l thereof. rlliis 'passage 26 is always open into the. 'high pressure and lvowf velocity zone lof tnev delivery' passage. 1in the embodiment shown in detail in vltig.

il the return pipe is provided. with a curved neck'' 'so' that it must face downward.

The fuel is drawn into'the feed receptacle by the suction 'or inspiration impulsesin the 'compression chamber which are transmitted vtothe feed receptacleand the surplus is discharged therefrom onl .the compression .iin-

pulses-andv forced *into -the return pipe The-diameter or capacity of this return pipe is such as to substantially retard the'passage of the fuel or air-'therethrough and is such l that it' vdoes not, vto an objectionable degree,

back to the reservoir through the return pipe affect the compression. The return'. check '24 prevents the return the fuel toxthe reservoir through the feed pipe 22 on the compression stroke, but 'any surplus'is driven 25. Assn; ed, the diameter or the capacity of the return pipei's such .that the surplus 'ueldoe's not dowl Jfreely therethrough as a pipe of such 4diainv'eter would materially ai4 ect the operating of the engine, but by providingl a discharge properly restricted, lthe surplus uel'is delivered .from-the 'feed receptacle Without mate ally affecting the vcompression or vthe feed; .e of the fueh The pressure on the c ression 'stroke is -suhcient to force the sur lusuel intothe return pipe,-on the s1 tion "stroke the Weight of the fuel in the ripe acts-'against the-suction so that only pzryrt of the fuel'is drawn back into the feed receptacle from `the return pipe, but additional `iuel is drawn thereto through the fuel pipe.

Stated in another Way, when the engine is running the fuel will surge backI and ,forth in the return pipe but as the weight of the 'uel is added to' the out-surge and subtracted from the iii-surge the motion of the uel in the return pipe/will be greater 'in' the direction .away

frorathe feed chamberywith the result that the surplus fuel will be discharged through the return pipe. As a float valve is entirely dispensed with the objections incident to y "such valvesare eliminated.

@n the charging stroke of the engine the 'air is compressed 1n the compression chain vbelgthe .passage 8 and the fuel receptacle. The piston itself-acting las a valve, 'in the structure illustrated, prevents its escape through the port 5 into the cylinder. llien the inlet port 5 is uncovered the air is driven through the' passage 8 and port 5 into the cylinder.

The )Velocity ci' air in the passage 8 as it p .the restriction 11 increases and. the

' as stated`,'connectedto the passage 8 within f the liquid intothe pipe on the compression lcure a struc lproportiot or air and liquid fuel are main tivo cycle internal combustion engines.;

fuel is delivered by the combined inspiretional action at the'mouth ofthe feed psssage and variations of pressure at thispoin't and Within the fuel feed, chamber, which is,

the high pressure low velocity zone thereof. As the ypassa-ge 26 is relatirely small a slight trapping action of the air within the chamber is obtained. By this` arrangement'- 'of parts l securey a structure in which uel, suchl as keroseneor'the heavier 'hydrocarbons, may be used satisfactorily, and one in which there are no moving parts in the :feed mechanism tobec'ome disarranged or Worn out. The return pipe 25 lisalso preferably oi' considerable' length., sothat should any hot gas be forced-therethrough it is, suiile cient-ly cooled sov as toprevent-dangerof ex-l plosion Within the fuel receptacle. v

ln the modification vshown in Figa Vl e. restricted port or discharge 27 opens into a receptacle :Zwhieh providedwith a drain' 29, The' structure lpreviously described is, however, preferred by meas with the strue'- ture. Shown in Fig. Vl there is 'a probabilityof air being discharged in considerable .quan-f. tities with the liquid and drawn back-again on. the suction andthis would detract some- .what from the eciency of thev engine.

In the modication shown `in Fig. VH. the curved neck of the return pipe is omitted. This forni 'quite satisfactory, but the .4 curved neck prevents the possibility of the airl tunneling through the liquid to4 the mouth of the return pipe instead oi"3 forcing stroke. n Q The receptacle 28 might be dispensed.

kvvitlnbrit as some fuel would. be discharged in vaporized form there would be an incldent iirerislr. TWith the parts thus arranged lustrated and described, I'. se-

e in which the proper relatire tot tained through varying running 'conditionssuch as variations in speed., lood .and throt tle opening.

' lily improved feed meclial'iisni isrery plel and economical in structure and, stated, there are no movable partsto weer out orlieconie disarranged l shown my improvements particularly al that rie is -tlie forni in which I have .enlodiee seine in practice. M v improvements man im. ma

irre of sniliodied in four cycle yor other gines.

Certain features o?? trated and described in this a p. described and claimed. .by me in ni in l application for Letters list.; 'f'- 7^ No. essere, ruedee, nur.

l .have4 not attempted to illust;

scribe such embodiment er t various.

embodiments which li contemplate as esl CII

Yle.-;siele, l believe the disclosure nude will enuble those skilled inthe nrt to which niy invention relutes to :itlupt oir-embody the`- smile muy be desired. Il desire, lioifevera 'Le be unrlersleo'rl :is churning my .improve-` ri nts speoihcelly in the forni illustrated :is

c 'well ns broutllyuithin the scope ef the zip- .el clarin-rs. rrr ing thus f Ani ns new ent, is z' l ie combination Withau internirlcomf onengine having In combustion Chain-- und eonrpression .'cliei'nher, of e del* pnssuge' connecting seid compression eer to the inlet "aber7 snul haring u restriction i the pre iure und Velocity ,r ieri lining delivery, n 'luel een recept-neleeloseil to utniesphe" enel desire to secure by Let- A i essuie zone, fuel supply reservoir, :i V.hiel supply pipe connecting seitl. feed ref e suitl fuel reseri'oiig suitl i'eecl re- `g in u'plzine above the Snel a cli-eli rnlre for sniil supply a fuel return pipe conneetet to sind reserVoir;- und. un open nr'issnge con'iniuuitli sind luel leei'lreeepuele above :e nu ii pressure und lou' renet of suirl rerurn pipe to subs antiiill)Y retiirtl the 'fuer therethrough, ull Couetdessi-ib eil` J D line combi husizion engine i airing u combustion churnlwr unil u compression Chamber,- o'l n cleli cry pass-rige connecting suitl Compression clnnnber to the inlet port of said zoinliusion cluunher, suitl passage herring :i restriction ein .vl'iercliy the pressure :nul velocity oi" the nir is ruriefl during tlelirenr, n :t'uel ieerl reeeptucle elesetl to atmospheric nir ssure` :i l'cerl. passage delivering into snirl ile-,livery pesi-Juge within, its high velocity lou' inessure Zone, n Jfuel supply re '-.'eir,

u fuel sup pipe connecting snirl receptacle uit iuel reserroir, u cliecl:

li snifgl 'vulve tor sail suppl)v pipe.` n. fuel return pas sr'ie conncetcl o sind fuel rescrnnr unil mth sziixl feed receptacle, ezine coninuniieting xrith said liucl fecal re- `miele ubore the inoutfli oi! seul return pusszig il with said (lelircurY paissugge villiin its lush pressure und low velocity zone. the cepncity of Suid return passage being such :is te lostniiliiully retnrtl the passage i'uel tiieretlirougli, :ill couetingsubstnntiull)v us described.

llie combination with un inlernul couilii. tion engine haring :i combustion churn-- lier untl i compression Chamber, l li 'errr pass-rige Connecting, said Compression described my invention, what port of said Combustion ire'y paissuge within its high velocity with ssitl delivery 'ation with 'un internal -eon i-- und nu open puset the.

of u (le-.

supply reservoir,

chamber-to the. inlet port of seid. 'combustion chamber, said passage having e 'restriction vtherein `whereby the l'pressure :1nd `velocity l" lche airY is varied-during delivery, fuel lfeed -receptnchn a leed passage delivering.

into said deliver) pussnge' within its high velocity low pressure zone, e, fuel supply reservoir, n iuel supply pipe connecting said leed receptacle with sind fuel reser\oir,' e oheokralve for` seid supply pipe, a surplus @fuel flisollarge. for Said 'eed receptacle, und

ing siilistnntinlly us' und for the purpose specified, ljThe combination with :in internal coinoustion engine having u combustion eliminlier unil n' compression clnuulier, of u fuel lcetl receptacle, :i fuel fectl connection l[or suirl feed rcceptu o? the fonipression chamber, the capacity olt 'said return pipe heine' such Vns to subs-tuin tiullv returi'l the discharge of the fuel there through. :ill conclure' substantially us lleserilietl for 'l'lie prupose spccilicrl.

.3. The combination uil'h un interlnil coni-- bustion engine haring' :i combustion chiunlier und :i ci'unpression clnunber, el" n fuel feed connection for sii l 'fccll receptacle to tlie'engiue. n fuell supply reservoir, u fuel si ppl)Y pipe connectlil lcetl rcccptucle with suiil fuel refer! Voir. u cliecl; vulve lor suicl suppliv pipei, n Yfuel return pussnge conuccterl lo suill fuel reservoir unil willi snirl lerl rcccpizuilc, :unl :i pnssujgje coimuunicutiig u irli will compi-cssion cliuuilur unil with suiil l'ucl feerl rell reptuclc uluuc llic mouth otsuirl return pris- .suur Wluffcllj ilic fuel lccrl rccipinelc is sul)g icci lo ihn ullcrnulr pressures uurlj'ncuiuns or ilu compri-funn clnuubcr. :i caipncitr of sull return inissug'c l'ciur sucn :is to sul)- slnul'iulli' rffiuiwl the pussufe ol' lllc 'luel vl`lrcrell=rough. :ill courting su"isluutiull)- ns l`cc l rrrcplau'lc. u 'fuel ilccll connection for unl l'ccil receptacle to thel engine, u fuel u fuel suppl)v pipe connectie to the engine, :1 luel.` supply reserron. ,i 'luelsupplrv pipe connectng seid ee. ieceptacie with said; fuel lesen Moine Cheek valvey for seid. supply pipe,;e

, :amphis i'neiI discharge for said ieeepteele,'y

imei-ien engine having n -eomhustioneheman@ e. compression' chamber, of ,e n'ei Teeepieeie, e, fuel feed conneotion fof I 'seid "eeci :receptacle to the engine, e fue! em ,iyA s 'esevein a fuel supply pipe conneeming sani ifeei ieeepteeie with said nei neem-voie, .e cheek valve for seid snppliypipev e 'uei feiern pipe connected' to se'id fuel eservei and provided with e curved neck ffm wheieby ne mouthothe pipe 'faces downwerciy, and e `peseege communicating with said eempessien chamber and with seid uei feed reoepeoie abo'e the mouth of said return pipe whereby 'the fuei feed ieeeptaele "'iveeimins of the compression chamber, the

' 'lihe combination with an inierna1cem-- vfuel ibf neiilnongb.a allcoaoiing subst-entieily es desoridoed fery the purpose specified. r 55 `*is -subject to the alterna-te pessiues and' iyiwgeee eepaoiy of seifi return pipe being such as to substantially ieteid the discharge lof the fuel therethrough, all coacting substantially as described for' the purpose specified. '35

8. 'The combination withv eninternai com- -bustion engine having a Combustion chambei: and e compression oharnbeif, of e -fuel feed 'reeepiecle, a 'uel feed -eonnectlon for' seid 'feed receptacle zo the engine, e.A fuel- 40 suopy i'eservvoii, a. ,hiel supply pipe connecting seid feed receptacle with said fuel reservoir, a. cheek' valve for seidsupfpiy pipe7 aff neiieiurn pipe connected to said. fuel reservoir 'and having a, `downwardly 'facing 45 r. mouth, and a 'passage ommnnieeting with seid; coingiieesion chamber and with seid is subject .to the alternate pressuresv and '50 Vacuums ef .the compression chamber, fthe capacity of seid return pipe belngsuches to substantially retardy the discharge .'o ehe n lwitness Wheieof, have hereunto set myfhand enjdvvseal in the'.` presence of two witnesses;

ARTHUR COTTLE. `itn'fessies:

" URLEY R. ,IB-Anm, v t WILLIAM J. TARRANT. 

